Plate-pack for photographic apparatus.



M. NIELL. PLATE PACK FOR PHOTOGRAPHIC APPARATUS.

APPLICATION FILED lUNE 27. IBM.

1,1 62,385. Patented Nov. 30, 1915.

Arrarwva Y8.

MAGNUS NIELL, OF DJUR-SHOLM, SIVEDEN.

PLATE-PACK FOR PHOTOGRAPHIC APPARATUS.

- Application filedJune 27, 1911.

'0 all whom it may concern:

Be it known that I, MAGNUs NIIiLL, a subject of the King of Sweden,residing at Djursholm, Sweden, have invented certain new and usefulImprovements in Plate- Packs for Photogrz phic Apparatus, of which thefollowing is a specification.

This invention relates to improvements in light proof envelops forcarrying photographic plates or films and means for en abling suchplates or films to be exposed in the camera and to be again inclosed ina light tightmanner in said envelop so as to enable same to be removedfrom the camera and, if desired afterward transferred to a daylightdeveloping box.

For the purpose of exposing the sensitive plates contained in the saidlight proof envelops, I make use of a device known as an adapter, whichis simply a hinged case provided on one side with an exposure apertureand at its open end with a suitable light trap to prevent fogging of theplates when making exposures. The said adapter, being similar to thosein general use for this purpose, does not call for more than a passingreference.

The envelop is chiefly made of some cheap material such as paper or thincardboard, that can be thrown away after use, and consists of an innerpart provided with means for holding the plates in position, an outerpart, taking the form of an opaque sheath or cover, adapted to slidetelescopically over the said inner part, and means for facilitating itsuse in combination with daylight developing boxes such as referred toabove.

In describing my invention in detail, reference is made to the drawingsherewith in which Figure 1 is a front View of the envelop with the outercover partly raised. Fig. 2 represents a sectional side view AB of Fig.1 of the envelop when closed, showing the sensitive plates in position.Fig. 3 is a similar view, the envelop having its outer cover or sheathpartly raised while held in its adapter. Figs. 4 to 13 represent variousmethods of forming the top of the outer cover, and the manner ofcoupling the same to a holder in the developing box. Fig. 14 shows amodified plan for holding the plates in position by means of U-shapedside arms. To'afcross strip 1 of cardboard or other material, is fixed,on each side, a flexible Specification of Letters Patent.

. and thus enable a Patented Nov. 30, 1915. Serial No. 635,620.

open frame 2, 2, on one side of which, at its upper end, a second crossstrip 3 is cemented.

The said strips 1 and 3 are of sullicient thickness to accommodate thesensitive plates -l, i, and an opaque dividing plate 5, which isslightly corrugated as at 5 for the purpose of preventing erraticmovement of the plates and to keep them pressed up to the focal planeduring exposure. The said dividing plate is not made integral with theinner part of envelop, but is placed between the plates prior to theirinsertion into the holder.

The first strip 1, with the open frames attached, is inserted into ametal cup or hinder t5 and permanently fixed therein by depressions 6made in the metal with a pointed tool or by other suitable means.

The said metal cup or binder is formed with a funnel shaped opening 3',which is designed to guide the lower enr. o the outer cover as theenvelop closes.

The two flexible frames 2, 2, are each at one end, e. at the lower end(Figs. 1 to 3) attached to the cross-strip 1 (which may be of wood)while at the other end (2'. e. at the upper end) only one of thesestrips 2 is attached to the cross-strip 3 (which may be of wood), thetop end of the other flexible open frame being unattached to the strip3, z 6. same is left free so that hen the outer cover or sheath 8 hasbeen withdrawn the top end of the two frames 2, 2 can be moved apartsensitive plate (or film} 41- to be inserted on each side of thecorrugated central partition or dividing-plate 5, so that when suchplates or films 4, have been placed in position the thick strip 3 canthen be moved back so as to overlap the edges of said plates or filmsand serve to hold the same in position, and the outer cover or sheath 8,8, is then slipped over the top end of these two open frames which areheld pressed closely together with the strip 3 therebetween.

I sometimes substitute for frames, flanged U-shaped metal side arms 11,11, 'Fig. 14:, into which the sensitive plates with the opaque dividingplate slide, an end block 12, being then inserted to fill the spaceformed by the extensions of the side arms beyond the ends of the plateswhen inposition. In adopting this plan, I form inwardly projectingtongues 13 on the side arms, to retain the plates and end i, 1 a n 1 theopen block in position. In the process of filling, the side arms arestrained slightly open to admit of the plates passing the said tongues,the end block is then placed in position so as to rest on the projectingtongues.

The outer cover or sheath 8, 8, may conveniently be made of thick blackpaper and is of suit-able dimensions to freely slide over the inner partwith its contained plates. The upper part of the said outer cover isprovided with a cross piece 9 for the convenience of coupling this partof the envelop to a clip 9 contained in the developing box abovereferred to, and to form a handle for manipulating the envelop when inthe in Figs. (3 and 7), a cross piece with end slots (3, 3 to engage onpins 3 (as shown in Figs. 8 and 9), a recessed cross piece 0 to slide ina clip (4, Figs. 10 and 11), and an extension 0 of the cover reinforcedby'compressing and cementing the front and back to form a doublethickness which may be perforated to engage over Copies of this patentmay be obtained for five cents each, by addressing pins 5 fixed to apart of the developing box (as shown in Figs. 12 and 13). The edges atthe open end of the outer cover are turned back to form narrow flanges,10, 10, Figs. 2 and 3, which answer the double purpose of stops toprevent the cover from being entirely withdrawn from the inner part ofenvelop when in the camera, and also to act as a light proof connectionwith the metal cup or hinder when the envelop is closed.

What 1 claim is 1. A ligl1tproof plate-pack, comprising a plate-holderformed of two open frames, connected by a cross-piece and a metal binderprovided with outwardly-flaring sides, a partition for separating thesensitive plates therein and an outer cover or sheath for sliding oversaid parts.

2. A light-proof plate-pack, comprising a plate-holder formed of twoopen frames connected by a cross-piece and a metal binder havingoutwardly-flaring sides, a partition for separating the sensitive platestherein, an outer cover sliding over said parts, and means on said outercover for coupling the latter with a developing box.

In witness whereof I have hereunto set my hand in presence of twowitnesses.

MAGNUS NIELL.

Witnesses HEDWIG MELINDER, Howaan LTASTROM.

the Commissioner of Patents,

Washington, D. C.

